Physics keeps slides from getting too close.

from Improved physics

- Phenomenon of slides approaching in [[physical operation]].
- In the first place, it's not right to get close to the slides, because if the physics happens, it means the slides are crowded and colliding.
- This is why I stayed away from it. Like this

cs

// update position
for (int i = 0; i < slides.Count; i++)
{
    GameObject obj = slides[i] as GameObject;
    // current position and distance
    Vector3 cpos = obj.transform.position;
    float cdist = (cpos - eye).magnitude;
    // next position and distance
    Vector3 npos = cpos + updateVec[obj];
    float ndist = (npos - eye).magnitude;
    if(ndist < cdist)
    {
        npos = eye + (npos - eye).normalized * cdist;
    }
    obj.transform.position = npos;
}

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